with non destructive image editing feature, digikam improved enormously.
For my opinon, the npn-destructive image editing feature is not used completely, but contains even more positive options than users can apply at the moment.

With an individual history for each picture, one needs building up versioning-systems like a chessboard pattern. Sometimes, one cannot forecast the results of a specific treatment in advance; instead, one is forced to apply series of slightly different parameter settings to find out the very best parameter combinations.  


Reproducible: Always

Steps to Reproduce:
1. in this digikam version 2.5, only the last (or selected version) of a pic is stored.

2. one should be able (with a checkbox, e.g.?), to store every image manipulation step between original and last step of a version

3. it should be possible to save certain manipulation steps (~´workflows´) as pre-defined user-individual template.
Actual Results:  
At this time, one needs to use non-destructive image editor with noting specific settings manually. Several different settings has to be testet individually. 
it is a lot of testing time to reproduce the same results agin

Expected Results:  
Change history should be saved in a per-pic-history